Electroless polymerization of aniline on platinum and palladium surfaces |
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| Institution: | 1. School of Chemistry, University College of Science, University of Tehran, Tehran, P.O. Box 14155-64558, Iran;2. Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran;3. Antimicrobial Resistance Research Center, Institute of Immunology and Infectious Diseases, Rasoul -e - Akram Hospital, University of Medical Sciences, Tehran, Iran;4. Department of Chemistry, Faculty of Science, University of Birjand, Birjand 97179-414, Iran |
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| Abstract: | Aniline was found to polymerize slowly and spontaneously on the platinum and palladium metal surfaces in an aqueous acid solution of the monomer. The phenomenon was thus equivalent to an “electroless polymerization” process. The polyaniline (PANI) so-deposited were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, and atomic force microscopy (AFM). The chemical state of the electroless deposited PANI film was near to that of the 75% intrinsically oxidized nigraniline (NA) state of PANI. The electrolessly deposited PANI films exhibited similar protonation–deprotonation behavior as that of the aniline homopolymer. The amount of the PANI deposited on the metal surface was affected by the monomer concentration, the nature of the acid medium, and the oxygen content in the reaction medium. |
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